WO2016093092A1

WO2016093092A1 - Solar battery module

Info

Publication number: WO2016093092A1
Application number: PCT/JP2015/083546
Authority: WO
Inventors: 司橋本; 嘉勲朱; 直樹後藤; 石田　謙介; 山口　裕之
Original assignee: 株式会社カネカ
Priority date: 2014-12-08
Filing date: 2015-11-30
Publication date: 2016-06-16
Also published as: JP2016111853A

Abstract

The present invention addresses the problem of providing a solar battery module with which it is possible to suppress unexpected performance deterioration and the occurrence of failures, in a construction in which at least two current collecting wires are fed into a terminal box from the same direction, without increasing the lengths of the current collecting wires more than necessary. At least a portion of a first current collecting wire 16 connected to a positive electrode of a solar battery cell 10, and at least a portion of a second current collecting wire 16 connected to a negative electrode of the solar battery cell 10 extend from the same direction toward a terminal box 4. At this time, said portions are in a state in which they are arranged parallel to one another, spaced apart in the direction in which they are arranged in parallel. Further, two contact point forming portions 64 and 77, with which the terminal box 4 is internally equipped, are in a state in which they are offset in the direction in which the first current collecting wire 16 and the second current collecting wire 16 are arranged in parallel.

Description

Solar cell module

The present invention relates to a solar cell module, and relates to a solar cell module in which current collecting wiring and an output cable are connected via a terminal box.

A solar cell module generally has a structure including a solar cell panel formed by arranging a plurality of solar cells in parallel, and an output cable for taking out generated electric power to the outside. In such a solar cell module, the current collecting wiring extending from the electrode of the solar cell is connected to the output cable via the terminal box, and the power generated in the solar cell can be taken out from the output cable to the outside. It has become.

An example of such a solar cell module is disclosed in Patent Document 1.
In the solar cell module disclosed in Patent Document 1, an opening is formed on the back surface of the solar cell panel, and an output lead wire (current collection wiring) is drawn out from the opening. And the terminal box is attached to the position which overlaps with this opening.

Here, an output lead wire introduction hole that communicates the inside and outside of the terminal box is provided at the bottom portion of the terminal box, which is located on the solar cell panel side. That is, the opening for drawing out the output lead wire formed in the solar cell panel and the output lead wire introduction hole formed in the terminal box are overlapped. For this reason, the output lead wire extended outside from the opening is in a state of being drawn into the terminal box from the output lead wire introduction hole adjacent to the opening.

In the terminal box, the leading end portion of the drawn output lead wire and the end portion of the output cable are in contact with the terminal plate. As a result, the output lead wire and the end of the output cable are electrically connected via the terminal plate.
In the solar cell module of Patent Document 1, a pressing piece for pressing the distal end portion of the output lead wire against the terminal plate is provided, and the output lead wire and the terminal plate are prevented from being displaced.

JP 2013-165236 A

In the solar cell module, current collecting wiring is connected to the solar cells, and the current collecting wiring is connected to the terminal box.
Paying attention to the layout of solar cells, current collector wiring and terminal box, the current collector wire connected to the positive electrode of the solar cell and the current collector wire connected to the negative electrode of any of the solar cells are both terminals. It will be extended towards the box.
In other words, when a plurality of solar cells are electrically connected by the current collector wiring, the current collector wiring connected to the positive electrode of one of the solar cells and the negative electrode of one of the solar cells are connected. The current collector wiring is extended toward the terminal box.

The distribution layout of the solar cells and the layout of the terminal box are left to the designer of the solar cell module and vary.
Therefore, depending on the layout of the solar cells and the terminal box, a structure in which the current collecting wiring is drawn into the terminal box from the same side of the terminal box may be suitable.
Therefore, depending on the position of the solar battery cell and the current collector wiring, there is a design desire to extend the current collector wire connected to the positive electrode and the current collector wire connected to the negative electrode from the same direction toward the terminal box. . For example, when two solar cells are both located on one side of the terminal box and the current collector wiring extends from the two solar cells toward the terminal box, the terminals are connected from the same direction. A wiring structure in which current collecting wiring is extended toward the box is preferable.

However, when two current collector wires are extended from the same direction toward the terminal box, at least a part of the current collector wires connected to the positive electrode is compared with a case where the two current collector wires are extended toward the terminal box from different directions. As a result, at least a part of the current collecting wiring connected to the negative electrode approaches. And if they are too close, they may interfere with each other and cause problems.

It is an object of the present invention to develop a terminal box suitable for a layout in which at least two current collecting wirings are drawn into a terminal box from the same direction, and to provide a solar cell module including the terminal box.
Specifically, the present invention can suppress unexpected performance degradation and occurrence of trouble without extending the current collecting wiring more than necessary when pulling at least two current collecting wiring into the terminal box from the same direction. It is an object to provide a solar cell module.

An aspect for solving the above problem is a solar cell module including a solar cell, a current collector wiring extending from the solar cell, and a terminal box in which a terminal plate to which the current collector wire is connected is incorporated. The current collector wiring includes a first current collector wiring connected to the positive electrode of the solar battery cell and a second current collector wiring connected to the negative electrode of the solar battery cell, The first terminal plate portion includes a first terminal plate portion for connecting one of the first current collecting wiring and the second current collecting wire, and a second terminal plate portion for connecting the other. And the second terminal plate portion are provided with contact forming portions for connecting the first current collecting wiring or the second current collecting wiring, respectively, and at least one end side portion of the first current collecting wiring, At least one end side portion of the second current collecting wiring from the same direction Extending toward the terminal box and parallel to each other in a predetermined parallel direction, the contact forming portions formed on the first terminal plate portion and the second terminal plate portion, respectively, The solar cell module is arranged at a position shifted in the parallel direction.

In the solar cell module of this aspect, at least one end side portion of the first current collecting wiring and at least one end side portion of the second current collecting wiring are extended in a state of being parallel with a predetermined interval, It is drawn into the terminal box from the same direction. Then, the two contact forming portions built in the terminal box and connecting each of the first current collector wiring and the second current collector wiring are shifted to a position shifted in the parallel direction of the first current collector wiring and the second current collector wiring. Forming.
From this, it becomes possible to extend each current collection wiring linearly toward the terminal box, and to contact the contact forming portion on the extension in the extending direction. That is, not only in the position close to the terminal box but also in the terminal box, either or both of the current collecting wirings meander or the current collecting wiring and the contact forming portion are not brought close to each other. Can be connected. In other words, it is a part on the one end side of the current collector wiring, and the part from the outside of the terminal box to the contact formation part can be extended without being extended more than necessary or bent or curved many times. In addition, the portions on one end side of the two current collecting wires do not approach each other. Therefore, it is possible to suppress the occurrence of problems caused by extending the current collecting wiring more than necessary, bending or curving it many times, or approaching the two current collecting wires.

Another aspect for solving the above problem is a solar battery including a solar battery cell, a current collector wiring extending from the solar battery cell, and a terminal box containing a terminal plate to which the current collector wiring is connected. The module, wherein the current collecting wiring includes a first current collecting wiring connected to a positive electrode of the solar battery cell and a second current collecting wiring connected to a negative electrode of the solar battery cell, The terminal plate includes a first terminal plate portion for connecting one of the first current collecting wiring and the second current collecting wire, and a second terminal plate portion for connecting the other. The terminal plate portion and the second terminal plate portion are respectively provided with contact forming portions for connecting the first current collecting wiring or the second current collecting wiring, and at least one end side of the first current collecting wiring is provided. A portion and at least one end side portion of the second current collector wiring Extending from the same direction toward the terminal box, the contact forming portion is located on an extension line in the extending direction of at least one of the first current collecting wiring and the second current collecting wiring, At least one of the first current collecting wiring and the second current collecting wiring extends without being folded back from a portion serving as an inlet of the current collecting wiring formed in the terminal box to the contact forming portion. It is the solar cell module characterized by being made.

Also in this aspect, at least one of the first current collector wiring and the second current collector wiring extends in a straight line without being folded at all. For this reason, generation | occurrence | production of the malfunction which arises by bending or curving a current collection wiring many times can be prevented.

In each aspect described above, the contact forming part is located on an extension line in the extending direction of at least the other of the first current collecting wiring and the second current collecting wiring, and the first current collecting wiring and the first current collecting wiring At least the other of the second current collector wires may be folded and extended between a portion serving as an inlet of the current collector wire and the contact forming portion.

With such a configuration, one of the two contact forming portions is positioned at the extended end of the current collecting wiring that extends without being folded, and the other is positioned at the extended tip of the current collecting wiring that is folded and extended. Become. From this, it becomes possible to arrange | position two contact formation parts in the position far apart, and it becomes possible to suppress generation | occurrence | production of the malfunction which arises when a positive electrode and a negative electrode adjoin.

In each aspect described above, at least one of the contact forming portions is located on an extended line in the extending direction in the extending, and at least one of the first current collecting wiring and the second current collecting wiring is It is preferable to extend without being folded back from a portion serving as an inlet of the current collector wiring formed in the terminal box to the contact forming portion.

According to such a configuration, at least one of the first current collecting wiring and the second current collecting wiring extends in a straight line without being folded at all, so that the current collecting wiring can be made relatively short. It is possible to prevent the occurrence of problems caused by bending or bending the wiring many times.

In such an aspect, at least the other of the first current collecting wiring and the second current collecting wiring is configured to be folded back from the portion serving as the inlet of the current collecting wiring to the contact forming portion. May be.

According to such a configuration, one of the two contact forming portions is positioned at the extended end of the current collecting wiring that extends without being folded, and the other is positioned at the extended tip of the current collecting wiring that is folded and extended. From this, it becomes possible to arrange | position two contact formation parts in the position far apart, and it becomes possible to suppress generation | occurrence | production of the malfunction which arises when a positive electrode and a negative electrode adjoin.
That is, only one of the two current collecting wirings is intentionally folded and extended only once, so that the two contact forming portions can be arranged at more distant positions, and is caused by the proximity of the positive electrode and the negative electrode. The occurrence of defects can be suppressed.

In each aspect described above, an output cable for extracting electricity to the outside is provided, and the output cable protrudes to the outside from the terminal box, and the protruding direction intersects with the extending direction in the extension. The direction is preferred.

The terminal box includes a box-shaped main body portion, and the main body portion is partitioned by a partition wall portion, and at least a part of the partition wall portion includes the first terminal plate portion and the second terminal. It is desirable that the small space including the first terminal plate portion and the second terminal plate portion is formed at a position close to the plate portion.

According to such a configuration, when the potting agent or the like is filled in the terminal box, the potting agent can be filled only around the first terminal plate portion and the second terminal plate portion. That is, the amount of potting agent required can be saved.

Moreover, in each above-mentioned aspect, it has a translucent board | substrate and a back surface sealing member, and there exists the said several photovoltaic cell between a translucent board | substrate and a back surface sealing member, and further on the back surface side of a back surface sealing member. There is the terminal box, the solar cells are arranged in a planar shape, the planar shape of the solar cell module is a quadrangle, the terminal box is in the center of the solar cell module, and all of the solar cells Alternatively, a group of the solar cells are connected in series by the current collecting wiring, and a part of the first current collecting wiring and the second current collecting wiring are in a portion near the same side of the solar cell module. The tip side of the solar cell module is preferably bent toward the center and extended toward the terminal box.

According to the present invention, it is possible to suppress unexpected performance degradation and occurrence of trouble without making the current collecting wiring longer than necessary.

It is explanatory drawing which shows the solar cell module which concerns on embodiment of this invention, (a) shows the surface side, (b) shows the back surface side. It is a perspective view which shows a mode that the solar cell panel of FIG. 1 was seen from the back surface side, and permeate | transmits and shows a part of internal structure. It is explanatory drawing which shows the structure of the solar cell panel of FIG. 1 typically. It is explanatory drawing which shows a mode that the solar cell module of FIG. 1 was seen from the back surface side, permeate | transmits a part of internal structure, and expanded a part, and it abbreviate | omits and shows the cover part of a terminal box in the expanded part. It is a top view which shows the terminal box of FIG. 1, and abbreviate | omits and shows a cover part. It is a perspective view which shows the main-body part of FIG. It is a perspective view which shows the 1st terminal board part of FIG. It is a perspective view which shows the 2nd terminal board part of FIG. It is a top view which expands and shows A area | region of the terminal box of FIG. It is explanatory drawing which shows a mode that the some solar cell module is connected on the roof, (a) shows a mode that the solar cell module of FIG. 1 is connected, (b) is the sun different from FIG. The state which connected the battery module is shown. It is explanatory drawing which shows a mode that a potting agent is filled in the accommodation space formed in the terminal box of FIG. 5, and a cover part is mounted | worn.

Hereinafter, the solar cell module 1 according to the embodiment of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1A, the solar cell module 1 of the present embodiment is a quadrangular and flat-plate solar cell panel 2 with no metal frame. That is, the solar cell module 1 of the present embodiment is a frameless solar cell module 1. And the terminal box 4 is attached to the back surface side of the solar cell panel 2, as shown in FIG.1 (b), and the 1st output cable 5 (output cable) and the 2nd output cable are attached from the terminal box 4. 6 (output cable) extends outward. The terminal box 4 is mounted at a position closer to the end than the center in the width direction of the solar cell module 1 (left-right direction in FIG. 1).
That is, the terminal box 4 is a central portion of the solar cell module 1 and is located closer to the end side than the center.

The solar cell panel 2 is a so-called crystal type solar cell, and has a structure including a plurality of plate-like solar cells 10 each having a silicon substrate and electrodes as shown in FIG. . That is, the solar cell panel 2 includes a translucent substrate 7 and a back surface protective material (back surface sealing member) in a state where a plurality of solar cells 10 are connected in series via lead wires 11 (current collection wiring). ) 8 is enclosed and formed.
In addition, the slit part 12 which connects the space located between the translucent board | substrate 7 and the back surface protection material 8, and the exterior is provided in the back surface side of the solar cell panel 2. As shown in FIG. The slit portion 12 is formed from three cuts (slits) formed on the back surface side of the solar cell panel 2, and has two horizontal slits so that the shape in plan view is substantially “I” shape. One vertical slit is formed. A part of the lead wire 11 is drawn out from the slit portion 12 to the outside.

More specifically, in the solar cell panel 2, two cell rows in which four solar cells 10 are formed in parallel are formed. That is, the plurality of solar battery cells 10 are arranged in parallel, and a plurality of cell rows in which the plurality of solar battery cells 10 are formed in parallel are formed. In addition, the number of the photovoltaic cells 10 is not limited, and there are actually many more. Further, the number of columns of solar cells 10 is not limited, and actually there are more columns.

The illustrated embodiment exemplifies a two-row structure in which the number of solar cells 10 is reduced and the layout is simple for ease of explanation.
In the illustrated embodiment, all the solar cells 10 are wired in series and connected to the terminal box 4 for easy explanation. However, in an actual solar panel, a plurality of solar cells 10 are connected. Divided into several groups, solar cells 10 belonging to each group were connected in series to form a plurality of series cell groups, and a plurality of series cell groups were connected in parallel and connected to the terminal box 4 was adopted. Many employ a wiring structure.
In any case, the lead wire 11 is connected to the electrode of each solar battery cell 10.

The lead wire 11 includes a connecting lead wire 15 extending between adjacent solar cells 10 and an output lead wire 16 extending from the inside of the solar battery panel 2 to the outside (first current collecting wiring, second current collecting wiring). ) And are arranged in different positions.

The connecting lead wire 15 is a wiring member for electrically connecting the electrodes of the adjacent solar cells 10, and one end and the other end are electrically connected to different electrodes of the solar cells 10. It is in a state. That is, one end of the connecting lead wire 15 is connected to the positive electrode of one solar cell 10 and the other end is connected to the negative electrode of another solar cell 10 to connect the solar cells 10 in series.

The output lead wire 16 is a wiring member for taking out a current from the solar battery cell 10 (more precisely, the solar battery cell group) to the outside, and is an end solar cell belonging to the solar battery cell group with one end connected in series. It is electrically connected to the electrode of the cell 10 and the other end is drawn out of the solar cell panel 2. More specifically, one end is directly connected to the electrode of the end solar cell 10 belonging to the solar cell group or indirectly through another member such as a bus bar electrode, and the other end is externally connected from the slit 12. It has been pulled out.

The layout of the output lead wire 16 is as shown in FIGS. 2 and 3, and one output lead wire 16 (for example, the output lead wire 16 connected to the positive electrode of the solar cell group) and the other output lead wire. The lead wires 16 (for example, the output lead wires 16 connected to the negative electrode of the solar battery cell group) are both located on the same short side of the solar battery module.
That is, the two output lead wires 16 both have

side arrangement portions

80 and 81.
The

side arrangement portions

80 and 81 of the two output lead wires 16 are both arranged at a position along one short side of the solar cell module 1. The two

side arrangement parts

80 and 81 are arranged along the same straight line, and the other side arrangement part 80 is on the extension of the one side arrangement part 80.
Further, the distal end sides of the

side arrangement portions

80 and 81 of the output lead wire 16 are bent toward the center of the solar cell module 1 and extended toward the terminal box. That is, there are center-facing

portions

82 and 83 on the distal end side of the

side arrangement portions

80 and 81 of the output lead wire 16.

Here, in the portion located in the vicinity of the slit portion 12, as shown in FIG. 3, the two output lead wires 16 extend along the longitudinal direction of the solar cell panel 2 with a predetermined interval L therebetween. It has become. That is, the

center facing portions

82 and 83 are in a state extending along the longitudinal direction of the solar cell panel 2 with a predetermined interval L.
In addition, the longitudinal direction of the solar cell panel 2, which is the extending direction of the output lead wires 16 in these portions (center facing portions 82 and 83), is the inclination direction of the roof when the solar cell module 1 is installed on the roof. It is also an orthogonal direction (column direction).

In a portion located in the vicinity of the slit portion 12, a part of one output lead wire 16 (one of the center facing portions 82 and 83) having one end connected to the positive electrode and the other one end connected to the negative electrode. A part of the output lead wire 16 (the other of the center facing portions 82 and 83) is arranged in parallel with each other, and both of them are in a linearly extending state. These are parallel to each other with a predetermined interval in the short direction of the solar cell panel 2 and extend in a direction from one side end of the solar cell module 1 toward the other side end.
The short direction of the solar cell panel 2, which is also the parallel direction of the two output leads 16, is also the direction that becomes the roof inclination direction (inter-beam direction) when the solar cell module 1 is installed on the roof. .

In the solar cell module 1 of the present embodiment, the terminal box 4 is attached to a portion overlapping the slit portion 12. The terminal box 4 has a substantially vertically long rectangular shape in plan view. And the short direction (width direction) of the terminal box 4 and the longitudinal direction of the solar cell panel 2 become the same direction, and the longitudinal direction of the terminal box 4 and the short direction of the solar cell panel 2 become the same direction. Installed.

As shown in FIG. 4, the lead wire introduction hole 20 (introduction port) formed in the terminal box 4 is located outside the slit portion 12, and the lead wire introduction hole 20 overlaps the slit portion 12. It is in a state. The output lead wire 16 extending to the outside from the slit portion 12 is in a state of being pulled into the terminal box 4 from the lead wire introduction hole 20 as it is.

As shown in FIG. 5, the terminal box 4 includes a first terminal plate portion 31 (terminal plate), a second terminal plate portion 32 (terminal plate), a box-shaped main body portion 30 whose one side is open, A bypass diode 33 is housed and formed. Inside the main body 30, one end portion of the first output cable 5 and one end portion of the second output cable 6 are also housed and connected to the second terminal plate portion 32 and the first terminal plate portion 31, respectively. It has become a state.
The terminal box 4 can be used in a state where the open surface of the main body 30 is closed with a lid 35 (not shown in FIG. 5).

As shown in FIG. 6, the main body 30 includes a bottom plate portion 40, a ridge side wall portion 41, a left side wall portion 42, an eaves side wall portion 43, and a right side wall portion 44 erected from the bottom plate portion 40. Yes. The ridge side wall portion 41, the left side wall portion 42, the eaves side wall portion 43, and the right side wall portion 44 are annularly continuous, and form a space inside.

Here, the ridge side wall 41 and the eaves side wall 43 are opposed to each other in the longitudinal direction of the terminal box 4, and the left side wall 42 and the right side wall 44 are separated from each other in the short direction of the terminal box 4. Yes. Each of the ridge side wall portion 41 and the eaves side wall portion 43 is in a state substantially orthogonal to each of the left side wall portion 42 and the right side wall portion 44.
In addition, when the solar cell module 1 is mounted on the roof, the ridge side wall portion 41 is a portion located at one end of the main body portion 30 on the ridge side, and the eaves side wall portion 43 is attached to the solar cell module 1 on the roof. When it becomes a part located at one end of the main body 30 on the eaves side.

A mounting flange portion 48 is provided on a portion located on the bottom plate portion 40 side of the outer side surfaces of the ridge side wall portion 41, the left side wall portion 42, the eaves side wall portion 43, and the right side wall portion 44. In addition, a cable retaining tube 49 into which the first output cable 5 and the second output cable 6 can be inserted is formed in the vicinity of the ridge side wall 41.

The mounting flange portion 48 protrudes outward from the outer side surfaces of the ridge side wall portion 41, the left side wall portion 42, the eaves side wall portion 43, and the right side wall portion 44, and is a plate-like portion that is continuous in an annular shape.

A partition wall portion 56 and a lead wire introduction hole 20 are formed in the bottom plate portion 40.

The partition wall part 56 is formed at a position slightly closer to the eaves side wall part 43 than the ridge side wall part 41, and crosses the space surrounded by the ridge side wall part 41, the left side wall part 42, the eaves side wall part 43, and the right side wall part 44. It extends like so. One end of the partition wall portion 56 is continuous with the left side wall portion 42, and the other end is continuous with the right side wall portion 44.

From these things, the accommodation space 60 which is the space surrounded by the left side wall part 42, the eaves side wall part 43, the right side wall part 44, and the partition wall part 56 is formed inside the main body part 30. That is, the main body 30 has a volume inside the space surrounded by the four side walls formed by the ridge side wall 41, the left side wall 42, the eaves side wall 43, and the right side wall 44. A small accommodation space 60 is formed.

The cable retaining tube 49 is a cylindrical portion that protrudes from the inner surface of the partition wall portion 56 toward the inside of the accommodation space 60. The inner hole of the cable retaining cylinder 49 is formed integrally with the side wall portion 41, the partition wall portion 56, and a hole penetrating the portion located therebetween, and a communication hole is formed continuously. And the accommodation space 60 are in communication with each other.
That is, a communication hole extending from a hole (not shown) formed on the outer side surface of the ridge side wall 41 to the protruding end of the cable retaining tube 49 is formed, and the outside of the main body 30 and the inside of the accommodation space 60 are formed. Is in communication. The inner diameter of the communication hole is substantially the same as the outer diameter of the end portions of the first output cable 5 and the second output cable 6, and when these are inserted, the first output cable 5 and the second output cable 6 The outer peripheral surface and the inner peripheral surface of the communication hole are in close contact with no gap (or are in contact with almost no gap).

The lead wire introduction hole 20 is a through-groove-shaped portion that penetrates the bottom plate portion 40, and the opening shape thereof is substantially rectangular. The lead wire introduction hole 20 extends along the longitudinal direction of the main body 30 and is in a state of being close to the eaves side wall 43. In other words, the lead wire introduction hole 20 is a groove-like portion extending from the vicinity of the eaves side wall 43 toward the ridge side wall 41.
In addition, although mentioned later in detail, when the 1st terminal board part 31 and the 2nd terminal board part 32 are attached to the accommodation space 60, this lead wire introduction hole 20 is formed so that it may be located between these. (See FIG. 5 and the like).

As shown in FIG. 7, the first terminal plate portion 31 is a substantially rectangular flat plate-like member, and includes a bypass plate portion 62, a long plate portion 63, and a contact formation portion 64.

The bypass plate portion 62 is a substantially rectangular plate-like portion extending horizontally, and a contact portion 62a for contacting the leg portion 33a of the bypass diode 33 (see FIG. 5) is formed on one end side in the width direction. . And this contact part 62a is a part which protruded to the one side in the width direction (direction shown by arrow X of FIG. 7).

At one end portion of the bypass plate portion 62 in the direction orthogonal to the width direction (the direction indicated by the arrow Y in FIG. 7), the edge portion is bent upward except for a part and raised upward. ing. In detail, the part located in the both ends in the width direction is raised, and the part near the center is not raised. A through hole 70 having a circular opening shape is formed between a portion of the one side end portion that is not raised and the other side end portion.

The long plate portion 63 is a substantially rectangular plate-like portion extending vertically, and both end portions in the width direction (the direction indicated by the arrow X in FIG. 7) are raised upward.

The contact formation part 64 is a part for making the lead wire 11 pulled out from the inside of the solar cell panel 2 come into contact, and the shape in plan view is a substantially rectangular plate.
At one end side in a direction orthogonal to the width direction of the contact forming portion 64 (direction indicated by an arrow Y in FIG. 7), the edge portion is raised upward. That is, the other end portion is bent upward.

As shown in FIG. 8, the second terminal plate portion 32 is a substantially rectangular flat plate member in which a bypass plate portion 76 and a contact formation portion 77 are integrally formed.

The bypass plate portion 76 is a substantially rectangular plate-like portion extending horizontally, and a contact portion 76a for contacting the leg portion 33a of the bypass diode 33 (see FIG. 5) is formed on one end side in the width direction. . And this contact part 76a is the part which protruded to the one side in the width direction (direction shown by arrow X of FIG. 8).

Here, when the bypass plate portion 76 is compared with the bypass plate portion 62 of the first terminal plate portion 31 described above, the plan view shape is a symmetrical shape in these installation states (FIG. 5). reference). That is, in the bypass plate portion 62 of the first terminal plate portion 31, the contact portion 62a is located on one end side in the width direction (the right side in FIG. 5), whereas in the bypass plate portion 76, the other end in the width direction. The contact portion 76a is located on the side (left side in FIG. 5).

Also in this bypass plate portion 76, as shown in FIG. 8, at one end portion in a direction orthogonal to the width direction, the edge portion is bent upward except for a part and raised upward. .
And the through-hole 70 with the circular opening shape is formed between the part which is not raised among one side edge parts, and the other edge part.

The contact formation portion 77 is a plate body having a substantially rectangular shape in plan view. The contact forming portion 77 is a portion for contacting the lead wire 11 drawn from the inside of the solar cell panel 2.
And at one end side in the direction orthogonal to the width direction (direction indicated by arrow Y in FIG. 8),
The edge portion is bent upward and is raised upward.

Subsequently, the internal structure of the terminal box 4 will be described in more detail.

Inside the main body 30, as shown in FIG. 5, the first terminal plate portion 31, the second terminal plate portion 32, and the bypass diode 33 are fixed inside the accommodation space 60.

The first terminal plate portion 31 and the second terminal plate portion 32 are in a state of being arranged in parallel at a predetermined interval in the width direction of the terminal box 4. And the cable latching cylinder 49 is arrange | positioned in the position away from each of the 1st terminal board part 31 and the 2nd terminal board part 32 to the ridge side wall part 41 side. Therefore, the two cable retaining cylinders 49 are also arranged in parallel at a predetermined interval in the width direction. And the part of the one end side of the 1st output cable 5 and the part of the one end side of the 2nd output cable 6 which are penetrated by each cable latching cylinder 49 and are located in the inside of the main-body part 30 are also predetermined in the width direction. Are in a parallel state with an interval of. The part on the one end side of the first output cable 5 and the part on the one end side of the second output cable 6 both extend linearly along the longitudinal direction of the terminal box 4.

A lead wire introduction hole 20 is formed between the attachment position of the first terminal plate portion 31 and the attachment position of the second terminal plate portion 32. That is, in the width direction of the lead wire introduction hole 20, the first terminal plate portion 31 is located at a position adjacent to the outside of the one side end portion, and the second terminal plate portion is located at a position located outside the other end portion. 32 is located.

Here, each of the first terminal plate portion 31 and the second terminal plate portion 32 is substantially L-shaped in plan view, and a part of the first terminal plate portion 31 and the second terminal plate portion 32 is outside the end portion in the width direction of the lead wire introduction hole 20. It is located and a part is located outside the end in the longitudinal direction of the lead wire introduction hole 20. In other words, both the first terminal plate portion 31 and the second terminal plate portion 32 are located on the outer sides of the two sides including the corner portion of the edge portion of the lead wire introduction hole 20.

For this reason, of the two sides facing in the longitudinal direction (direction orthogonal to the width direction) of the lead wire introduction hole 20, the contact of the bypass plate portion 62 in the first terminal plate portion 31 is just outside the one side. The portion 62a and the contact portion 76a of the bypass plate portion 76 in the second terminal plate portion 32 are located. In other words, the contact portion 62a of the first terminal plate portion 31 and the contact portion 76a of the second terminal plate portion 32 are arranged in parallel with an interval.

On the other hand, the eaves side wall 43 is located just outside the other side of the two sides facing each other in the longitudinal direction of the lead wire introduction hole 20.

That is, as shown in FIG. 9, the lead wire introduction hole 20 is surrounded by the first terminal plate portion 31, the second terminal plate portion 32, and the eaves side wall portion 43 so as to surround most of the periphery. It has become.

Here, the 1st terminal board part 31 is latched in the state which cannot be relatively moved by the main-body part 30 by the latching means which is not shown in figure.
That is, in the first terminal plate portion 31, the bypass plate portion 62, the long plate portion 63, and the contact forming portion 64 are each in the longitudinal direction (vertical direction in FIG. 9) and short direction (horizontal direction in FIG. 9) of the terminal box 4. ) Is fixed so that it cannot be moved. In other words, each of the bypass plate portion 62, the long plate portion 63, and the contact forming portion 64 is mounted so as not to be displaced from the arrangement position, so that the first terminal plate portion 31 is mounted on the main body portion 30 without being displaced. It has a possible structure.

Similarly to the first terminal plate portion 31, the second terminal plate portion 32 is also hooked by a hooking means (not shown) so that each of the bypass plate portion 76 and the contact forming portion 77 is not displaced from the arrangement position. As a result, the displacement of the second terminal plate portion 32 can be prevented.

Here, when the first terminal plate portion 31 and the second terminal plate portion 32 are compared, in the first terminal plate portion 31, a long plate portion 63 is formed between the bypass plate portion 62 and the contact forming portion 64. The second terminal plate portion 32 is different in that the long plate portion 63 is not formed. For this reason, the length (length in the longitudinal direction) of the second terminal plate portion 32 is shorter than that of the first terminal plate portion 31.

And as FIG. 5 shows, the part from the ridge side wall part 41 of the 1st terminal board part 31 and the part from the ridge side wall part 41 of the 2nd terminal board part 32 are the longitudinal directions of the terminal box 4 The positions in the vertical direction in FIG. 5 are the same. For this reason, the contact forming portion 64 of the first terminal plate portion 31 and the contact forming portion 77 of the second terminal plate portion 32 are arranged at positions shifted in the longitudinal direction of the terminal box 4.

More specifically, assuming that the center position of the contact formation portion 64 of the first terminal plate portion 31 in plan view is P1, and the center position of the contact formation portion 77 of the second terminal plate portion 32 is P2, the terminal box. The distance L2 from P1 to P2 in the longitudinal direction 4 is the same (or substantially the same) as the distance L between the two output lead wires 16 in the vicinity of the slit portion 12 (see FIG. 4).
Here, the contact forming portion 64 of the first terminal plate portion 31 and the contact forming portion 77 of the second terminal plate portion 32 are the same shape. That is, the arrangement positions of the two

contact forming portions

64 and 77 are shifted by a distance L2 in the longitudinal direction of the terminal box 4.

From this, as shown in FIG. 4, the two output lead wires 16 extending at a predetermined interval L along the longitudinal direction of the solar cell module 1 and the solar cell panel 2 are drawn into the terminal box 4. At this time, it is possible to make the output lead wire 16 and the first terminal plate portion 31 and the second terminal plate portion 32 electrically contact each other as they are in contact with the two

contact forming portions

64 and 77.

That is, the two output lead wires 16 are extended from the end portion side in the longitudinal direction of the solar cell panel 2 toward the terminal box 4, and on the extension line in the extending direction of each output lead wire 16, Some

contact forming portions

64 and 77 are located.
For this reason, unlike the structure in which the contacts are arranged in parallel in the width direction, the output lead wire 16 is not extended in the direction intersecting with the extending direction, and the two output lead wires 16 are not brought close to each other. The lead wire 16 can be connected to the first terminal plate portion 31 and the second terminal plate portion 32.

More specifically, one of the two output lead wires 16 includes a portion extending from the outside of the terminal box 4 in a direction approaching the terminal box 4, and the lead wire introduction hole 20 to the contact forming portion 77. The part extends in the same direction. That is, the output lead wire 16 is in a state of extending linearly without meandering.

Here, when the output lead wire 16 is extended for a long time, the resistance of the output lead wire 16 increases, which affects the output. In addition, disconnection or the like may be caused by performing bending or bending many times. In the present embodiment, the output lead wire 16 is linearly extended, so that the overall length can be shortened as compared with the case where the output lead wire 16 is extended in a meandering manner. Further, the output lead wire 16 is extended without being bent or bent many times. can do. For this reason, occurrence of such a problem can be prevented.

Here, the other of the two output lead wires 16 is folded back once inside the terminal box 4 and extends in the opposite direction. That is, a portion extending from the outside of the terminal box 4 in a direction approaching the terminal box 4 and a portion from the lead wire introduction hole 20 to the contact forming portion 64 extend in the opposite directions.
In other words, in the terminal box 4, the two output lead wires 16 extend in directions away from each other. As a result, the two

contact forming portions

64 and 77, that is, the first terminal plate portion 31 and the second terminal plate portion 32 can be arranged at positions separated in the short direction of the terminal box 4. Furthermore, the 2nd output cable 6 and the 1st output cable 5 which were respectively connected to the 1st terminal board part 31 and the 2nd terminal board part 32 can also be arrange | positioned in the position away in the transversal direction.

Here, if the positive electrode and the negative electrode are too close to each other, they may interfere with each other and cause problems. However, in this embodiment, the two output lead wires 16, the first terminal plate portion 31 and the second terminal plate portion 32, and the first output cable 5 and the second output cable 6 are arranged without being close to each other. It becomes possible. That is, it is possible to prevent the occurrence of problems caused by bringing the positive electrode and the negative electrode close to each other.

In the solar cell module 1 of this embodiment, the two output lead wires 16 are extended from the left side wall portion 42 side to the inner side of the terminal box 4, and the first terminal plate portion 31 and the second terminal plate portion. 32 is in contact with each. And the 1st output cable 5 and the 2nd output cable 6 are connected to the part by the side of the ridge side wall 41 of each of the 1st terminal board part 31 and the 2nd terminal board part 32, and the 1st output cable 5 and the 2nd output The cable 6 protrudes from the ridge side wall 41 to the outside of the terminal box 4. That is, in the solar cell module 1 of the present embodiment, the protruding direction of the first output cable 5 and the second output cable 6 is a direction that intersects the drawing direction of the two output lead wires 16. In other words, the protruding direction of the first output cable 5 and the second output cable 6 is a direction that intersects the extending direction in the portion of the two output lead wires 16 adjacent to the terminal box 4.

At this time, the angle formed by the extending direction and the protruding direction is preferably 50 to 130 degrees, more preferably 80 to 110 degrees, and more preferably 87 to 93 degrees. . Therefore, in the solar cell module of the present embodiment, the angle formed between the extending direction of the two output lead wires 16 in the vicinity of the terminal box 4 and the protruding direction of the first output cable 5 and the second output cable 6 is as follows. It is formed to be 90 degrees. That is, the projecting directions of the first output cable 5 and the second output cable 6 are orthogonal to the extending direction of the two output lead wires 16 in the portion close to the terminal box 4.

As described above, the extending direction of the output lead wire 16 in the portion adjacent to the terminal box 4 and the protruding direction of the first output cable 5 and the second output cable 6 are crossed, and the first output cable 5 and the second output cable 5 When the output cable 6 is structured to protrude from the ridge side portion, when the plurality of solar cell modules 1 are connected on the roof, the first output cable 5 and the second output cable 6 can be connected without being greatly bent, preferable.

If it demonstrates concretely, as the solar cell module 1 of this embodiment is shown by Fig.10 (a), one 1st output cable 5 of the adjacent solar cell module 1 and the other 2nd output cable 6 will be shown. Use with the connected. At this time, the plurality of solar cell modules 1 electrically connected to each other are arranged in parallel on the roof, and the protruding directions of the first output cable 5 and the second output cable 6 intersect with the parallel direction of the solar cell module 1. Direction. At this time, when the first output cable 5 and the second output cable 6 are projected from the ridge side which is one of the two sides facing each other in the longitudinal direction of the terminal box 4, the first output cable 5 and the second output cable 5 Connection is possible by simply extending the 2-output cable 6.

On the other hand, as shown in FIG. 10B, consider a case where two

output cables

105 and 106 are projected from one side of the terminal box 104. At this time, when one output cable 105 is extended to one side as it is, it is not necessary to bend the output cable 105, but when the other output cable 106 is extended to the other side, the output cable It is necessary to extend 106 so as to bypass the terminal box 104. That is, the output cable 106 needs to be extended while being largely bent.
From this, like the solar cell module 1 of this embodiment, the output cable from one side of the two sides facing in the longitudinal direction of the terminal box 4, in other words, from the plane orthogonal to the parallel direction of the solar cell module 1. A structure for projecting is preferable.

By the way, in the solar cell module 1 of this embodiment, after connecting the output lead wire 16 and the

contact formation parts

64 and 77 via solder etc., as shown in FIG. The agent is filled and the lid 35 is attached.
The potting agent is used for the purpose of fixing, protecting, and moisture-proofing the member, and contains a suitable resin such as a silicone resin as a main component.

Here, as described above, the first terminal plate portion 31 is provided with the through hole 70 penetrating itself in the thickness direction. And the 2nd terminal board part 32 is also provided with the through-hole 70 which penetrates self in thickness direction. For this reason, when the potting agent is poured into the accommodation space 60, the potting agent flows into the back surface side of the first terminal plate portion 31 and the second terminal plate portion 32 through the through holes 70. In other words, the potting agent can be poured into the back side of the member, which is a portion where the potting agent is difficult to flow. This makes it possible to spread the potting agent throughout the accommodation space 60 and fill the potting agent evenly.

Here, paying attention to the accommodation space 60, the accommodation space 60 is a space partitioned by the left side wall portion 42, the eaves side wall portion 43, the right side wall portion 44, and the partition wall portion 56 as described above. That is, in the terminal box 4 of the present embodiment, the partition wall portion 56 is provided, thereby forming an accommodation space 60 that is a smaller space than the entire internal space of the main body portion 30. The accommodating space 60 is filled with a potting agent. Accordingly, the amount of the potting agent required can be reduced as compared with the case where the entire internal space of the main body 30 is filled with the potting agent.

In the above-described embodiment, the lead wire introduction hole 20 extending in the longitudinal direction of the terminal box 4 is provided, and the two output lead wires 16 are drawn into the terminal box 4 from the one lead wire introduction hole 20. That is, an example is shown in which the opening shape is a vertically long rectangular shape, and two output lead wires 16 are drawn from holes extending in a groove shape.
However, the present invention is not limited to this. A plurality of holes for drawing the output lead wire 16 may be provided. The first introduction hole for drawing one output lead wire 16 and the other output lead wire are provided at positions separated in the longitudinal direction of the terminal box 4. Each of the second introduction holes for drawing the lead wire 16 may be provided. The opening shape is not limited to a square, and may be changed as appropriate, such as a circle.

In the embodiment described above, an example in which only one partition wall portion 56 is provided has been described, but the present invention is not limited to this. A plurality of partition wall portions may be formed. For example, the partition wall portions are partitioned so as to be along the first terminal plate portion 31 and the second terminal plate portion 32 just outside the first terminal plate portion 31 and the second terminal plate portion 32. A wall portion may be provided and a small space smaller than the accommodation space 60 may be formed. In this case, the effect of further reducing the amount of potting agent used can be expected.

In the above-described embodiment, an example in which the slit portion 12 is formed by providing a cut on the back surface side of the solar cell panel 2 is shown, but instead, even if a through hole is formed on the back surface side of the solar cell panel 2. Good. That is, the lead wire 11 may be drawn out from the through hole formed on the back surface side of the solar cell panel 2. The opening shape at this time may be a circular shape in plan view or may be a polygonal shape. The lead wire 11 may be pulled out to the outside without difficulty. However, the opening is preferably as small as possible from the viewpoint of preventing the entry of foreign matter into the space located between the translucent substrate 7 and the back surface protective material 8, and as described above, a notch is provided. A configuration that functions as a communication portion (opening) for drawing out the lead wire 11 is preferable.

1 Solar cell module 4 Terminal box 5 First output cable (output cable)
6 Second output cable (output cable)
10 Solar cell 11 Lead wire (collection wiring)
16 Output lead wire (first current collector wiring, second current collector wiring)
20 Lead wire introduction hole (introduction port)
30 Body 31 First terminal plate (terminal plate)
32 Second terminal plate (terminal plate)
64 Contact formation part 77 Contact formation part

Claims

A solar cell module including a solar cell, a current collector wiring extending from the solar cell, and a terminal box in which a terminal plate to which the current collector wire is connected is built,
The current collecting wiring includes a first current collecting wiring connected to a positive electrode of the solar battery cell and a second current collecting wiring connected to a negative electrode of the solar battery cell,
The terminal plate includes a first terminal plate portion for connecting one of the first current collector wiring and the second current collector wire, and a second terminal plate portion for connecting the other,
The first terminal plate portion and the second terminal plate portion are each provided with a contact forming portion for connecting the first current collector wiring or the second current collector wire,
A portion on at least one end side of the first current collecting wiring and a portion on at least one end side of the second current collecting wiring are extended from the same direction toward the terminal box, and spaced in a predetermined parallel direction. It ’s open and parallel,
The solar cell module according to claim 1, wherein contact forming portions formed respectively on the first terminal plate portion and the second terminal plate portion are arranged at positions shifted in the parallel direction.
A solar cell module comprising a solar cell, a current collector wiring extending from the solar cell, and a terminal box containing a terminal plate to which the current collector wire is connected, wherein the current collector wire is the solar cell. A first current collecting wiring connected to the positive electrode of the cell; and a second current collecting wiring connected to the negative electrode of the solar battery cell, wherein the terminal plate includes the first current collecting wiring and the second current collecting wiring. It consists of a first terminal plate part for connecting one of the current collector wirings and a second terminal plate part for connecting the other, and the first terminal plate part and the second terminal plate part include the Contact forming portions for connecting the first current collecting wiring or the second current collecting wiring are provided, respectively, at least one end side portion of the first current collecting wiring and at least one end side of the second current collecting wiring. Part extends from the same direction toward the terminal box The contact forming part is located on an extension line in the extending direction of at least one of the first current collection wiring and the second current collection wiring, and the first current collection wiring and the second current collection wiring At least one of the solar cell module is extended without being folded back from a portion serving as an inlet of the current collector wiring formed in the terminal box to the contact forming portion.
At least one of the contact forming portions is located on an extension line in the extending direction in the extension,
At least one of the first current collecting wiring and the second current collecting wiring extends without being folded back from a portion serving as an inlet of the current collecting wiring formed in the terminal box to the contact forming portion. The solar cell module according to claim 1, wherein the solar cell module is a solar cell module.
The at least other of said 1st current collection wiring and said 2nd current collection wiring is turned back from the part used as the inlet of the said current collection wiring to the said contact formation part. The solar cell module described.
It has an output cable for extracting electricity to the outside,
The said output cable protrudes outside from the said terminal box, Comprising: The protrusion direction is a direction which cross | intersects the extending direction in the said extension, The any one of Claim 1 thru | or 4 characterized by the above-mentioned. Solar cell module.
The terminal box includes a box-shaped main body,
The body part is partitioned by a partition wall part,
At least a part of the partition wall portion is disposed at a position close to the first terminal plate portion and the second terminal plate portion, and includes a small space including the first terminal plate portion and the second terminal plate portion. Is formed, The solar cell module according to any one of claims 1 to 5.
A transparent substrate and a back surface sealing member, the plurality of solar cells between the light transmitting substrate and the back surface sealing member, and the terminal box on the back surface side of the back surface sealing member;
The solar cells are arranged in a planar shape, the planar shape of the solar cell module is a rectangle, and the terminal box is in the center of the solar cell module,
All of the solar cells or a group of the solar cells are connected in series by the current collector wiring, and the first current collector wire and a part of the second current collector wire are the same in the solar cell module. The solar cell according to any one of claims 1 to 5, wherein the solar cell is located near a side, and a tip end side thereof is bent toward the center of the solar cell module and extends toward the terminal box. module.